HTS 8409Parts suitable for use solely or principally with the engines of heading 8407 or 8408

Product or HTS code

Rate lines22

Code	Description	General	Special	Column 2	Units
8409.10.00	8409.10.00For aircraft enginesGeneral Free · Column 2 35%	Free		35%
8409.10.00.40	8409.10.00.40For use in civil aircraftGeneral Free · Column 2 35% · kg	Free		35%	kg
8409.10.00.80	8409.10.00.80OtherGeneral Free · Column 2 35% · kg	Free		35%	kg
	Other
8409.91	8409.91Suitable for use solely or principally with spark-ignition internal combustion piston engines (including rotary engines)
8409.91.10	8409.91.10Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machineryGeneral Free · Column 2 10%	Free		10%
8409.91.10.40	8409.91.10.40For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704General Free · Column 2 10% · kg	Free		10%	kg
8409.91.10.60	8409.91.10.60For marine propulsion enginesGeneral Free · Column 2 10% · kg	Free		10%	kg
8409.91.10.80	8409.91.10.80OtherGeneral Free · Column 2 10% · kg	Free		10%	kg
	Other
	To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704
8409.91.30.00	8409.91.30.00Aluminum cylinder headsGeneral 2.5% · Special Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · No., kg	2.5%	Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	No., kg
8409.91.50	8409.91.50OtherGeneral 2.5% · Special Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35%	2.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%
8409.91.50.10	8409.91.50.10Connecting rodsGeneral 2.5% · Special Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · No., kg	2.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	No., kg
8409.91.50.81	8409.91.50.81Steel forgingsGeneral 2.5% · Special Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · kg	2.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	kg
8409.91.50.85	8409.91.50.85OtherGeneral 2.5% · Special Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · kg, No.	2.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	kg, No.
8409.91.92	8409.91.92For marine propulsion enginesGeneral 2.5% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35%	2.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%
8409.91.92.10	8409.91.92.10Connecting rodsGeneral 2.5% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · No., kg	2.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	No., kg
8409.91.92.90	8409.91.92.90OtherGeneral 2.5% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · kg	2.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	kg
8409.91.99	8409.91.99OtherGeneral 2.5% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35%	2.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%
8409.91.99.10	8409.91.99.10Connecting rodsGeneral 2.5% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · No., kg	2.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	No., kg
8409.91.99.90	8409.91.99.90OtherGeneral 2.5% · Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · kg	2.5%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	kg
8409.99	8409.99Other
8409.99.10	8409.99.10Cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machineryGeneral Free · Column 2 10%	Free		10%
8409.99.10.40	8409.99.10.40For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704General Free · Column 2 10% · kg	Free		10%	kg
8409.99.10.60	8409.99.10.60For marine propulsion enginesGeneral Free · Column 2 10% · kg	Free		10%	kg
8409.99.10.80	8409.99.10.80OtherGeneral Free · Column 2 10% · kg	Free		10%	kg
	Other
8409.99.91	8409.99.91To be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704General 2.5% · Special Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35%	2.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%
8409.99.91.10	8409.99.91.10Connecting rodsGeneral 2.5% · Special Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · No., kg	2.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	No., kg
8409.99.91.90	8409.99.91.90OtherGeneral 2.5% · Special Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · kg, No.	2.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	kg, No.
8409.99.92	8409.99.92For marine propulsion enginesGeneral 2.5% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35%	2.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%
8409.99.92.10	8409.99.92.10Connecting rodsGeneral 2.5% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · No., kg	2.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	No., kg
8409.99.92.90	8409.99.92.90OtherGeneral 2.5% · Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) · Column 2 35% · kg	2.5%	Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	35%	kg
8409.99.99	8409.99.99OtherGeneral Free · Column 2 35%	Free		35%
8409.99.99.10	8409.99.99.10Connecting rodsGeneral Free · Column 2 35% · No., kg	Free		35%	No., kg
8409.99.99.90	8409.99.99.90OtherGeneral Free · Column 2 35% · kg	Free		35%	kg

2026 HTS Revision 21 (October 9, 2026)

Duty by country of origin

Rate line	Mexico35.75% of imports	Japan14.79% of imports	China11.13% of imports	Germany8.81% of imports	Canada6.24% of imports	South Korea4.68% of imports	India3.37% of imports	Brazil2.77% of imports	Italy1.58% of imports	United Kingdom1.25% of imports
8409.10.00.40For use in civil aircraft	10%9903.05.55	12.5%9903.05.49	37.5%9903.05.319903.88.01	10%9903.05.39	10%9903.05.29	12.5%9903.05.71	10%9903.05.44	37.5%9903.05.019903.05.27	10%9903.05.39	10%9903.05.81
8409.10.00.80Other	10%9903.05.55	12.5%9903.05.49	37.5%9903.05.319903.88.01	10%9903.05.39	10%9903.05.29	12.5%9903.05.71	10%9903.05.44	37.5%9903.05.019903.05.27	10%9903.05.39	10%9903.05.81
8409.91.10.40For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704	VariesDepends on product facts	VariesDepends on product facts	From 25%9903.88.03Depends on product facts	From 15%9903.94.53Depends on product facts	VariesDepends on product facts	From 15%9903.94.63Depends on product facts	VariesDepends on product facts	VariesDepends on product facts	From 15%9903.94.53Depends on product facts	From 10%9903.94.32Depends on product facts
8409.91.10.60For marine propulsion engines	10%9903.05.55	12.5%9903.05.49	37.5%9903.05.319903.88.03	10%9903.05.39	10%9903.05.29	12.5%9903.05.71	10%9903.05.44	37.5%9903.05.019903.05.27	10%9903.05.39	10%9903.05.81
8409.91.10.80Other	10%9903.05.55	12.5%9903.05.49	37.5%9903.05.319903.88.03	10%9903.05.39	10%9903.05.29	12.5%9903.05.71	10%9903.05.44	37.5%9903.05.019903.05.27	10%9903.05.39	10%9903.05.81
8409.91.30.00Aluminum cylinder heads	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.91.50.10Connecting rods	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.91.50.81Steel forgings	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.91.50.85Other	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.91.92.10Connecting rods	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.91.92.90Other	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.91.99.10Connecting rods	From 12.5%9903.05.55AD/CVD may apply	12.5%9903.05.49	From 40%9903.05.319903.88.03AD/CVD may apply	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.91.99.90Other	From 12.5%9903.05.55AD/CVD may apply	12.5%9903.05.49	From 40%9903.05.319903.88.03AD/CVD may apply	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.99.10.40For vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704	VariesDepends on product facts	VariesDepends on product facts	From 25%9903.88.03Depends on product facts	From 15%9903.94.53Depends on product facts	VariesDepends on product facts	From 15%9903.94.63Depends on product facts	VariesDepends on product facts	VariesDepends on product facts	From 15%9903.94.53Depends on product facts	From 10%9903.94.32Depends on product facts
8409.99.10.60For marine propulsion engines	10%9903.05.55	12.5%9903.05.49	37.5%9903.05.319903.88.03	10%9903.05.39	10%9903.05.29	12.5%9903.05.71	10%9903.05.44	37.5%9903.05.019903.05.27	10%9903.05.39	10%9903.05.81
8409.99.10.80Other	10%9903.05.55	12.5%9903.05.49	37.5%9903.05.319903.88.03	10%9903.05.39	10%9903.05.29	12.5%9903.05.71	10%9903.05.44	37.5%9903.05.019903.05.27	10%9903.05.39	10%9903.05.81
8409.99.91.10Connecting rods	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.99.91.90Other	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.99.92.10Connecting rods	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.99.92.90Other	12.5%9903.05.55	12.5%9903.05.49	40%9903.05.319903.88.03	10%9903.05.39	12.5%9903.05.29	12.5%9903.05.71	12.5%9903.05.44	40%9903.05.019903.05.27	10%9903.05.39	12.5%9903.05.81
8409.99.99.10Connecting rods	10%9903.05.55	12.5%9903.05.49	37.5%9903.05.319903.88.03	10%9903.05.39	10%9903.05.29	12.5%9903.05.71	10%9903.05.44	37.5%9903.05.019903.05.27	10%9903.05.39	10%9903.05.81
8409.99.99.90Other	10%9903.05.55	12.5%9903.05.49	37.5%9903.05.319903.88.03	10%9903.05.39	10%9903.05.29	12.5%9903.05.71	10%9903.05.44	37.5%9903.05.019903.05.27	10%9903.05.39	10%9903.05.81

Total duty on a $10,000 ocean shipment entered 2026-10-13, before customs fees. Origins are the leading sources of US imports under this heading in 2025 (US Census Bureau).